.btn_list {
    margin-top: 20px;
    text-align: center;
}
// .btn {
//     margin: 20px 0 0 30px;
// }
.container {
    margin: 30px auto 0;
    position: relative;
    width: 500px;
    height: 300px;
    border: 1px solid #66f;
    overflow: hidden;
    &::after {
        position: absolute;
        left: 0;
        right: 5px;
        top: 3px;
        bottom: 0;
        background-color: #fff;
        content: "";
        z-index: 1;
    }
}
.container_remove::after {
    display: none;
}
.box {
    overflow: auto;
    height: 100%;
    &::-webkit-scrollbar {
        width: 5px;
    }
    &::-webkit-scrollbar-track {
        background-color: #f0f0f0;
    }
    &::-webkit-scrollbar-thumb {
        border-radius: 2px;
        background-color: #66f;
    }
}
.content {
    padding: 10px 20px;
    background: linear-gradient(to right top, #f66 50%, #f0f0f0 50%) no-repeat;
    background-size: 100% calc(100% - 298px + 5px);
}
.content > * {
    position: relative;
    z-index: 2;
}
h1 {
    margin: 0;
    line-height: 30px;
    text-align: center;
    font-size: 20px;
}
p {
    margin: 10px 0 0 0;
    line-height: 24px;
    font-size: 16px;
    text-indent: 2em;
}
